From f2cd89401721d1f547a54ff6619d0dc9c8c9e863 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Sun, 3 Mar 2019 14:11:08 +0100
Subject: mg2d: be less strict for converging to machine epsilon

---
 mg2d.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mg2d.c b/mg2d.c
index a8511da..eb3973b 100644
--- a/mg2d.c
+++ b/mg2d.c
@@ -362,7 +362,7 @@ static int mg_solve_subgrid(MG2DContext *ctx, MG2DLevel *level)
 finish:
     res_new = level->solver->residual_max;
     if (!isfinite(res_new) ||
-        (res_new > DBL_EPSILON && res_old / res_new <= 1e-1)) {
+        (res_new > 1e2 * DBL_EPSILON && res_old / res_new <= 1e-1)) {
         mg2di_log(&ctx->priv->logger, MG2D_LOG_ERROR,
                   "The relaxation step at level %d has diverged: %g -> %g\n",
                   level->depth, res_old, res_new);
-- 
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